Camtasia6 - Zoom is unfocused/pixelated

I've search online and other places. I'm sure this has been covered/answered, but I didn't find what I was looking for.

I shot a video with a camcorder, uploaded it (MPEG4) to Cam6. It's our band jamming. When I try to insert a zoom onto the face of the singer during the chorus, it's very broken up and pixelated, like when you zoom into a picture.

Yeah, that's kind of what I figured. I shot it at 1280 x 720 and tried editing it at all different resolutions, but it didn't matter.

This seems like something that you should be able to accomplish. Somehow, somewhere, with something. I mean, it's done professionally all the time, granted they're probably using $20,000 worth of software.

Red 5's have been replaced by a new generation of 5K's with a resolution of 5120 × 3000. Camtasia can't edit at this level.

There's 8K's as well. 8192 × 4320

I reduced this 8192 x 4320 image to 2048 x 1080 so the file size would be small enough to up load here, were limited to 2mb. 8k images are simply to large.Here I am zoomed into a 1920 x 1080 portion of that same image.

And then zoomed to 1280 x 720

So you see, its not software magic. Because such magic doesn't exist. It's always about the quality of the footage.

Going back to old Hollywood movies. Typically shot with 35mm film. Had a resolution of around 20 megapixels.